$OpenBSD: patch-kccommon_h,v 1.1 2017/04/16 20:27:48 sthen Exp $
--- kccommon.h.orig	Sun Apr 16 21:20:37 2017
+++ kccommon.h	Sun Apr 16 21:20:22 2017
@@ -82,7 +82,7 @@ using ::modfl;
 using ::snprintf;
 }
 
-#if __cplusplus > 199711L || defined(__GXX_EXPERIMENTAL_CXX0X__) || defined(_MSC_VER)
+#if __cplusplus > 199711L || defined(__GXX_EXPERIMENTAL_CXX0X__) || defined(_MSC_VER) || defined(__clang__)
 
 #include <unordered_map>
 #include <unordered_set>
